Paper-knife



(No Model.)

H. B. ALLEN. PAPER KNIFE.

Patented Dott -4, 1892.

1 ans can mow-mum, wAsnmcYon u c UNITED STATES PATENT OFFICE.

HERBERT B. ALLEN, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO JOHN E. A. HUSSEY, OF BROOKLINE, MASSACHUSETTS.

PAPER-KNIFE.

SPECIFICATION forming part of Letters Patent No. 483,519, dated October 4, 1892.

Application filed T uly 2, 1892. Serial Hm 438,737. (No model.)

To all whom it may concern.-

Be it known that I, HERBERT B. ALLEN, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented a new and useful Improvement in Paper-Roll Knives, of which the following is a specification, reference being had to the accompanying drawings, which form a part hereof.

The paper that is used in the large newspaper-printing establishments comes in large cylindrical rolls wrapped snugly in heavy Wrapping-paper and sealed at the sides and at the ends where it is lapped. When the roll of paper is desired for use, it is difficult to remove this Wrapper with the hands alone, or if an ordinary knife be used it is difiicult to cut away the wrapper without cutting into the roll.

The object of my invention is aknife which will easily slit open the wrapper without inj uring the inclosed roll of paper; and it consists, essentially, of a blade having longitudinally on one face an upright rib with cuttingedge.

In the drawings, Figure l is a side elevation of a knife embodying my invention. Fig. 2 is a top view. Fig. 3 is a cross-section on line 3 3 of Fig. 1. Fig. 4 is a perspective view showing the knife in operation.

The blade at is preferably formed with a rounding taper at the end to enable it to be easily inserted under the edge of the wrapper, but not pointed so as to catch. The rib b is secured on the upper face of the blade a, either permanently by soldering, riveting, or otherwise, or detachably, as preferred. This rib extends longitudinally of the blade,though preferably not the entire length of the blade, and its edge gradually inclines upward from the face of the blade at each end of the rib. The forward end of the rib does not extend quite to the end of the blade, so that the end of the blade may first be inserted under the edge of the wrapper g that is to be cut, and as the blade is pushed along the inclined edge of the rib acts as a cutting-wedge to slit the wrapper. The edges of the blade are preferably sharpened to an edge also to cut around under the edge of the wrapper at the end of the roll. There is a double bend in the shank at c d, so that the handle f maybe grasped by the hand while the blade slides along flat on its under face.

What I claim as my invention is l. A paper-roll knife consisting of a blade, a longitudinal upright rib with cutting-edge on the upper face of the blade and tapering downward toward its forward end,andahandle which enables the blade to be pushed while lying on its under face, substantially as described.

2. A paper-roll knife consisting of a blade with cutting-edge, a longitudinal upright rib with cutting-edge on the upper face of the blade and tapering downward at each end, the forward end of the rib extending short of the end of the blade, and the shank of the blade bent to raise the handle above the plane of the blade, substantially as and for the purpose described.

HERBERT B. ALLEN.

WVitnesses:

O. P. KOENIG, GEO. W. LUBKE, Jr. 

